It’s not exactly surprising that Kavus Torabi has finally gone solo. There’s too much hopeful, demanding inventiveness in him ever to submit entirely to the dynamics of a group, despite the fact that he’s currently got at least three on the go, most of them with him at the helm – the brassy lysergically-illuminated avant-pop of Knifeworld; the ritual instrumentalism of Guapo, and the cantering countercultural circus of Gong (transferred onto his lanky shoulders, history and all, following the 2015 death of Daevid Allen).

What’s more surprising is the direction he’s chosen for the first records under his own name (the new ‘Solar Divination’ EP and a full upcoming album for later in the year). A darker, more agrarian take on his psychedelic homeground, this time it’s drumless, bassless, hornless – rinsed clear of the capering squirrel energy he’s shown for twenty-odd years, in order to reveal muted, angsty bones. Mostly based around slow, smoky-lunged harmonium stretches and sparse flotsam drags of guitar chording, this is a more foreboding turn of song, haunted by deaths, loss and disintegrations. It’s never mopey or lachrymose, thank goodness (even in Knifeworld or The Monsoon Bassoon, Kavus knew how to undercut joyous tootling with passing shadows without souring the milk) but these new songs are overcast with sombre vulnerability: the gravel-grain in Kavus’ voice welling up from deeper, ghostlier territories than before.

Despite being a couple of decades younger than Kavus, Cosmo Sheldrake has been out on his own for a bit longer. It’s been four-and-a-half years since Cosmo put out anything as part of super-eclectic mongrel troupe Gentle Mystics, but during that time he’s been gently dabbing the release schedules with occasional singles, videos and EPs of his own. Earlier work brought some of the Mystics weird and charming vibe along with it: a homemade-toy, party-in-the-fairy-forest feeling, Cosmo lilting skewed nursery-rhyme verses over softly bouncing weaves of melody. In the videos, he came across as a generous digital troubadour on a set of meandering visitations, playing his lashed-up keyboards-and-tech assemblages for performances in model villages, truck beds, pigsties and fishing boats.

Byronic-looking but Branestawm-minded, Cosmo’s a shed-pop tinkerer and a baffling multi-instrumentalist with a mixed mystical/academic background. Part kid’s entertainer and part hippy-boffin, he has a shamanical nose for the margin between nonsense and connection. More recent efforts (trailing the imminent release of his debut album ‘The Much Much How How and I’) have seen chewier, pacier and poppier songs. The videos, meanwhile, have become an ingenious riot of increasingly theatrical, fantastical and sometimes macabre fabling in which foil monsters swim in canvas seas and giant fluffy headlice run amok. There’s a communal, childlike warmth to what he does: not perhaps a guileless wonder, but a sense of celebration, where fables and singalongs and misadventures become part of the accepted, useful junk with which we build our nests.

Kavus’ upcoming tour is a brief series of simmering April dots around England and Wales; Cosmo’s is a more leisurely, lengthy two-month loop, garlanding the British Isles and western Europe. They’re not sharing any shows, or even any venues. The only time they overlap in any respect is on the 25th of April, when they’re playing different but simultaneous one-man shows a stone’s throw apart in Bristol. It would be nice to think of them looking up midset on that one evening, peering across that city-central loop of the Avon, and nodding to each other. Not necessarily natural comrades but, in their way, parallel leywalkers. Each with a bit of Barrett in the back pocket, each with a peculiar charm of innocence, each with fingertips in the otherworldly and the mythic. The uncontainables…

Kavus’ tour also happens to be a chance to catch an intriguing spread of fellow musicians, reflecting the wide body of musical ideas and affinities he touches upon. While in Margate (squeezed into a former Victorian coach house transformed into the Japanese/Alpine cheese dream of a minature theatre), he lines up with two left-field folk acts: the organ-draped, ridge-walking green-chapel psychedelia of Arch Garrison and the mysterious brand-new “wonk-folk” of Bovril (featuring Tuung’s Mike Lindsay). In Birmingham, the bill sharer is Scaramanga Six songwriter Paul Morricone, providing gutsy acoustic songs of fear and brutality with lashing of dark Yorkshire humour. Paul and Kavus also reunite in York for the Tim Smith fundraiser Evening of Fadeless Splendour, alongside the off-kilter art rock of Redbus Noface and the sarcastic-bastard English songcraft of Stephen Gilchrist (a.k.a. Stephen Evens).

On his Manchester date, Kavus will be supported by Peaks (Ben Forrester, formerly of shouty slacker-punk duo Bad Grammar and Manc math-rock supertrio Gug, now performing “loop-driven emo pop”). In London, it’ll be V Ä L V E – once an avant-garde solo project (full of belches and found sounds, situational scoring and sound-art jokes) for Kavus’ Knifeworld bandmate Chloe Herington, now an increasingly ubiquitous three-woman live trio (evolved and evolving into a warm-hearted feminist/Fluxus/Rock In Opposition massing of harps, bassoon, punk bass and singalong bunker-folk). In Leeds, Kavus plays the quiet support act in a free gig for tintinnabulating Sheffield post-metallers May The Night Bless You With Heavenly Dreams (whose echoing tremstrumental pinings add a little magical shimmy to the usual doleful post-rock astronomy) and Bristolian experimental rockers Madilan (whose songs recall both the angst-shredded psychedelic night-journeys of Oceansize and also, in their spindly electronics and Autotuned vocal musing, post-Oceansize rocktronicists British Theatre).

In contrast, most of Cosmo’s dates are solo – possibly because once he’s unshipped his assorted instruments and gizmos (from euphoniums and banjos to loop pedals and pennywhistles), there’s not much room for anyone else in the dressing room. Nonetheless, support for eight of the European April dates comes from Liverpool-based Norwegian girl trio I See Rivers, who wed their outstanding and eerily resonant Scandinavian vocal harmonies, sunny dispositions and scanty guitar to their own balloon-light, touching folk-pop songs and to heart-thawing covers of Daughter (Medicine), George Ezra (Budapest), and Whitney Houston (‘80s wedding fave I Wanna Dance With Somebody).

For the London album launch for ‘The Much Much How How and I’, Cosmo and I See Rivers are joined by Bunty – “multi-dimensional beat merchant and vocal juggler” Kassia Zermon. Also to be found fronting jazz/junk/folk trio Le Juki, co-fronting dub act Resonators, and co-running Brightonian experimental label Beatabet, Kassia’s run Bunty for years as a loopstation-based “one woman electro-orchestra” bolstered by her multi-instrumentalism and vivid imagination. Parallels with Cosmo are clear (the looping and beatboxing, a life blossoming with social art initiatives and therapeutic work beyond the entertainments) and she guests on one of the ‘Much Much’ tracks (very much an equal passing through, with a cheeky hug and a bit of upstaging), but her own vision is distinct. Giddier, jazzier, less directly English in its whimsy, with input from her Moroccan heritage and from her taste for Andy Kaufman; a slightly more cosmic playbox; imaginary languages; an undiluted Brightonian fabulosity.

Kassia’s last Bunty album, ‘Multimos’, was a pocket-sized multimedia event spanning apps, interactive AV, dream machines, audience choirs and gaming cues. Time and occasion will probably only allow a smidgin of that, this time around, but it’ll be a window onto her explosively colourful world.

There’s a little information about some of the support acts and bill sharers. In London and Brighton, there’ll be sets by what are effectively the house improv bands. At the Horse Improv Club, it’ll be the free array of Adam Bohman (amplified objects), Adrian Northover (sax/electronics), Hutch Demouilpied (trumpet/flute) and Sue Lynch (tenor sax/clarinet). At Safehouse, it’ll be the duo of Gus Garside (double bass and electronics) and drummer/percussionist James Parsons: there’ll also be a performance by The Wildcard Quartet, Safehouse’s usual four-piece of randomly selected names from the Brighton improv community. (For two Wildcard examples, see the murky video clip I’ve trawled up below, plus the rather more viewable one under that…)

At Cheltenham’s Xposed Club, In the Sea will be supported by the piano duo of Mike Adcock and Pete Robson. In Glasgow, they’re part of a three-act show – the other two acts being Glaswegian-Bradfordian exploratory collective Bravest Boat (longstanding guitar duo Stevie Jones and Jer Reid, plus viola player/singer Aby Vulliamy, trombonist George Murray and violinist Rafe Fitzpatrick) and the quixotic, master-of fuzzy-genre voyager Richard Youngs (whose list of collaborators and fellow-sparkers stretches from Jandek to Skullflower and Acid Mothers Temple, and whose work frequently features soft songs with avant-garde interruptions).

Later on in the tour – in the Austrian town of Lafnitztal, close to the Hungarian border – In The Sea will be playing on a bill with the “close, loose” trans-European Trio 876 (featuring Italian avant-jazz percussionist Marcello Magliocchi, Belgian total-voice artist Jean-Michel van Schouwburg and Swiss violin master Matthias Boss). For the latter, expect a quick, febrile and knowing shuffle of everything from structured tunes, mouth sputters, blind charges, yodelling, singing and elements from both “logic and fantasy”: in other words, a full gamut. Belgian double bassist Jean Demey will be guesting, rendering the trio a full quartet for this particular evening – but for original trio action, see below.